Jaaskelainen's departure to West Ham in the summer left Bogdan as the undisputed first choice for the Trotters and he has also claimed the No.1 jersey for the Hungary national team.

"I'm delighted with the extension," he told the club's official website. "I think it's always a good feeling when the club wants to extend.

"I hope it's a good message for everyone and proves that I see my future here and that I am enjoying playing for the manager. I want to get back to the Premier League as quickly as possible and I see this as a big step."